D-614 PENTA PRISMS |
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As the name implies, Penta Prisms, also commonly known as optical squares, have five sides positioned so as to accept, reflect, and transmit collimated light at exactly 90° to the incident beam.
Two sides of the prism are 90° to each other with the face of one side acting as the entrance face, and the face of the other side acting as the exit face, or vice versa. Two of the remaining three sides are positioned to reflect light entering the prism 90°, the third side being incidental. The azimuth or horizontal plane is referred to as the insensitive plane. Light may enter the entrance face along this plane as much as ±5°: from normal and the exit beam will always be 90° to the entrance beam.
A 1 inch (25.4 mm) diameter steel arbor that can be firmly gripped in a lathe collet or milling machine chuck is available as an accessory. All models are provided in durable & reusable hardwood carrying cases. |
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Specifications: (Applies to all Penta Prisms)
| Surface Quality: | 80/50 per MIL-O-13830 | |
| Material: | Prism: | BK-7 PH4 (or better) Glass |
| Housing: | Super hard anodized aluminum | |
| Rear Face Coating: | Aluminum with protective overcoat per MIL-M-13508 | |
| Finish: | Ivory enamel | |
| Carrying Case: | Hardwood | |
Specifications:
| Accuracy: | 2 arc sec | 3 arc sec | 5 arc sec | |
| Aperture: | Height: | 1 inch (25 mm) | 1.75 inch (44 mm) | 3 inch (76 mm) |
| Width: | 1.875 inch (48 mm) | 1.875 inch (48 mm) | 3 inch (76 mm) | |
| Overall Dimensions: | Height: | 2 inch (51 mm) | 2.6 inch (66 mm) | 4.5 inch (114 mm) |
| Width: | 4 inch (102 mm) | 3.875 inch (79 mm) | 6 inch (152 mm) | |
| Length: | 4 inch (102 mm) | 3.875 inch (79 mm) | 6 inch (152 mm) | |
| Height to Aperture Center: | 1.1 inch (28 mm) | 1.47 inch (63 mm) | 2.25 inch (57 mm) | |
| Weight: | 2.5 lbs (1.1 kg) | 3 lbs (1.4 kg) | 12 lbs (5.5 kg) | |
| Shipping Weight: | 7 lbs (3.2 kg) | 7.5lbs (3.4 kg) | 18 lbs (8.2 kg) | |
Optional Accessories:
515-0093 1 inch (25 mm) diameter solid steel arbor
515-0072 2.25 inch (57 mm) diameter hardened stainless steel tube to fit standard NAS-90 spherical and other mounts
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